From Jan info. Must do:
Preconditions:
A. You have w7SP1/8.1 activated successfully.
This actually doesn't apply to VL Volume_licenses no KMS
(loader yes, pre-installations yes, OEM_DM for w8.1 yes,
OEM system builder yes, retail yes), since they are officially
not upgradeable.
I think you have that, Verify with @echo off
slmgr /xpr
Go here : see title

Select Download Tool Now (x32 or x64)
Run
Select Upgrade this PC now.
Next
Relax.
If you cannot take chances, do a backup with "HDCLONE" first to play safe.
Done several times.

Click to expand...

I did bodmas method. But I found the Download Tool Now option when things went wrong. Next time I'll use Download Tool Now as it seems easier and less complicated.

From Jan info. Must do:
Preconditions:
A. You have w7SP1/8.1 activated successfully.
This actually doesn't apply to VL Volume_licenses no KMS
(loader yes, pre-installations yes, OEM_DM for w8.1 yes,
OEM system builder yes, retail yes), since they are officially
not upgradeable.
I think you have that, Verify with @echo off
slmgr /xpr
Go here : see title

Select Download Tool Now (x32 or x64)
Run
Select Upgrade this PC now.
Next
Relax.
If you cannot take chances, do a backup with "HDCLONE" first to play safe.
Done several times.

Click to expand...

If you're talking a activated retail copy in the end, then you have it wrong about VL/GVLK and KMS.